spiced blackberry jelly

In a saucepan mix together all ingredients EXCEPT sugar. Cook the berries over low heat, stirring and crushing them with a spoon, until they are soft. Pour the mixture through a jelly bag, without squeexing the bag, and measure it. For each cup of juice stir in one cup of sugar and cook the syrup over low heat until a little jells when dropped on a cold plate. Pour the jelly into hot sterilized glasses and seal.